#include "socketheader.h"
#define BUFFER_SIZE 2000

int main(int argc, char*argv[]) {
    if (argc <= 2) {
        printf("usage:%s ip_address port_number send_buffer_size\n", basename(argv[0]));
        return 1;
    }
    const char* ip = argv[1];
    int port = atoi(argv[2]);
    struct sockaddr_in server_address;
    bzero(&server_address, sizeof(server_address));
    server_address.sin_family = AF_INET;

    inet_pton(AF_INET, ip, &server_address.sin_addr);

    server_address.sin_port = htons(port);
    int sock = socket(PF_INET, SOCK_STREAM, 0);

    assert(sock >= 0);

    int sendbuf = atoi(argv[3]);
    int len = sizeof(sendbuf);

    setsockopt(sock, SOL_SOCKET, SO_SNDBUF, &sendbuf, sizeof(sendbuf));
    getsockopt(sock, SOL_SOCKET, SO_SNDBUF, &sendbuf, (socklen_t*)&len);

    int secvbuf;
    int secvlen = sizeof(secvbuf);
    getsockopt(sock, SOL_SOCKET, SO_RCVBUF, &secvbuf, (socklen_t*)&secvlen);


    printf("the tcp send buffer size after setting is %d %d\n", sendbuf, secvbuf);

    if (connect(sock, (struct sockaddr*)&server_address, sizeof(server_address)) != -1) {
        char buffer[10];
        memset(buffer, 'a', 10);
        printf("send buffer %s\n", buffer);
        send(sock, buffer, BUFFER_SIZE, 0);
    }
    close(sock);
    return 0;
}